The ability to set a limit in the Redstone Probe Connector GUI, much like a side input to a Comparator would.
Only output once the limit is reached. For simplicities sake, I think subtractor mode is not important.

The reason is, when you want to do limit testing, right now you need to run the Probe Connector output into a Comparator and then back into the redstone wire net.
But using the Probe Connector to get the Comparator values very often makes checking for a limit a desired action, because any digital logic afterwards depends on the digital true/false evaluation of "is the desired limit reached". Without that additional check, any digital logic would just trigger on the limit of redstone strength 1.

Especially with the addition of the Logic Units, which can not deal with the "analogue" values itself, this would help keep the logic much more compact.